add general environment and refactor environment's w/r funcs

tests/metagpt/environment/__init__.py

@@ -0,0 +1,3 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Desc   :

tests/metagpt/environment/test_gym_environment.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Desc   : unittest of gym environment
+
+from metagpt.environment.gym_environment import GymEnvironment
+
+
+def test_gym_environment():
+    gym_env = GymEnvironment(name="CartPole-v1")
+    gym_env.init_register_funcs()
+
+    observation, info = gym_env.call_func("reset", seed=42)
+    for _ in range(2):
+        action = gym_env.call_func("sample_action")
+        observation, reward, terminated, truncated, info = gym_env.call_func("step", action=action)
+        if terminated or truncated:
+            observation, info = gym_env.call_func("reset")
+    assert len(observation) == 4
+    gym_env.call_func("close")

tests/metagpt/test_environment.py

@@ -9,7 +9,7 @@
 import pytest
 
 from metagpt.actions import BossRequirement
-from metagpt.environment import Environment
+from metagpt.environment.environment import Environment
 from metagpt.logs import logger
 from metagpt.manager import Manager
 from metagpt.roles import Architect, ProductManager, Role